#StackBounty: #wireless #graphics #intel-graphics #xps Serious screen flickering when WiFi is on (Dell XPS 15)

Bounty: 50

I have a problem with a new Dell XPS 15 1050. After installation (or just using the live image) of 18.04 (and .1) and turning on WiFi, I get dramatic screen flickering every few seconds, especially when pulling data across WiFi. This includes bursts of coloured static for many seconds, artefacts, and the screen going black until a key is pressed.

I’ve tried multiple different combinations of graphics drivers with the same effects.

I have also tried Fedora with the same results.

I can’t understand why no one else seems to have had this problem. I’d suspect a hardware problem but Windows seemed to work OK. Any ideas appreciated.

$ sudo lshw -C video
*-display UNCLAIMED
description: 3D controller
product: GP107M [GeForce GTX 1050 Ti Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: memory:ec000000-ecffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:3000(size=128) memory:ed000000-ed07ffff
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:138 memory:eb000000-ebffffff memory:80000000-8fffffff ioport:4000(size=64) memory:c0000-dffff 

$ sudo lshw -C network
description: Wireless interface
product: QCA6174 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:3b:00.0
logical name: wlp59s0
version: 32
serial: 9c:b6:d0:fd:9b:55
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.17.4-041704-generic firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:139 memory:ed200000-ed3fffff

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